All, I finally finished my Obtronix Apple 1 reproduction! Actually, building the Apple 1 didn't take much time at all! It was the custom work on the mounting board, the curved and angled plastic leg brackets, and, and ... I uploaded photos of it to http://www.vintage-computer.com/vcforum/album.php?u=6611 I also have a request: My Obtronix Apple 1 reproduction had a bad Signetics 2504v. I don't think it was DOA (I believe it just "developed" the problem recently). The Signetics 2504v is a 1024-bit dynamic shift register, 8-pin dip. It's used here to as part of the display control. The problem I saw was odd numbers (1,3,5,7,9,A,C,E) in every other screen column were displayed as the preceding ASCII character (0,2,4,6,8,@,B,D). Data from the keyboard was stored correctly in main RAM. The video memory problem just displayed it incorrectly. Anyway, does anyone have a source of a Signetics 2504v? Or possibly, is there other more readably available junk-hardware-for-parts that I could pull a 2504v? Thanks! Scott Austin